package com.sky.service.admin.Impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        employee.setStatus(StatusConstant.ENABLE);
        employee.setPassword(PasswordConstant.DEFAULT_PASSWORD);

        employeeMapper.insertEmployee(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee findEmployeeById(long id) {
        return employeeMapper.findEmployeeById(id);
    }

    /**
     * 通过id更新员工状态
     * @param id
     * @param status
     * @return
     */
    @Override
    public void updateEmployeeStatusById(long id,Integer status) {
        Employee employee = findEmployeeById(id);
        employee.setStatus(status);
        employeeMapper.updateEmployeeStatusById(employee);
    }

    /**
     * 修改员工信息
     * @param employeeDTO
     * @return
     */
    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        Employee employee = Employee.builder()
                .status(StatusConstant.ENABLE)
                    .password(PasswordConstant.DEFAULT_PASSWORD)
                        .build();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.updateEmployee(employee);
    }

    /**
     * 修改当前登录用户的密码
     * @param passwordEditDTO
     * @return
     */
    @Override
    public void updateEmployeePassword(PasswordEditDTO passwordEditDTO) {
        Employee employee = employeeMapper.findEmployeeById(BaseContext.getCurrentId());
        if (employee.getPassword().equals(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()))) {
            employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
            employeeMapper.updateEmployeePassword(employee);
        }else{
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        employeeMapper.updateEmployeePassword(employee);
    }

}
